mod30286.exe  Mod 30-286 Starter diskette v 1.02 
adv30286.exe  Advanced Diags for Mod-30 & Mod-25 286s 

SHS64F3987     IBM PS/2 Model 30 HMR 
SHS64F3988     IBM PS/2 Model 30 286 HMR 
SHS15F2191     IBM PS/2 Model 25/30  HMS 
SHS15F2192     IBM PS/2 Model 30 286 HMS 

189-035  PS/2 MODEL 30 286 (8530-E01)
189-091  PS/2 MODEL 30 286 (8530-E0R)
189-013  PS/2 MODEL 30 286 (8530-E2R)
188-145  PS/2 MODEL 30 286 (8530-E21)
188-146  PS/2 MODEL 30 286 (8530-E01)

8530 Power 

F1 Fuse J1 Mouse J2 KB J3 Parallel J4 Display connector J5 DB25 Serial J6 ISA bus riser J7 Power-supply connector J9 Memory packs J10 Optional memory packs J11 Hard-disk drive connector J12 Diskette-drive connector J13 Password-override J14 Power-supply connector  SP1 Speaker ZM1 287-10 ZM2 VLSI VL82C100 ZM3 VLSI VL82C102A ZM4 VLSI VL82C103A ZM5 VLSI VL82C104

ZM6 VLSI VL82C101B ZM9 VLSI VL16C451 ZM11 30F9580 BIOS Even ZM12 30F9579 BIOS Odd ZM14 SLA6140J1P 72X8206 ZM18 15F6864 ZM19 NEC D765AC-2 ZM21,22 4ea OKI M41464-12 ZM23 Inmos IMSG171P-35 ZM27 Motorola MC1488P ZM28,29 NS DS1489AN ZM31 8509232 ZM33 ? ZM35 Dallas DS1287 ZM36 286-10 Y1 14.318 MHz xtal Y2 25.175 MHz osc Y3 28.32200 MHz osc Y4 20.000 MHz osc Y5 48.0 MHz osc

Planar courtesy of the Western Gunslinger, "Dead-Eye" David Beem

J13    To disable the power-on password, move the J13 jumper to the unused position.

From William R. Walsh:
  A Model 30 (no 286) is a machine equipped with an 8086 CPU and low density 3.5 inch floppy drive(s). It may have a hard disk, usually 20MB. Some high density floppy drives are supported by this computer, though IBM never officially built them this way.

A Model 30 (with the 286) is a 286 with 1 1.44MB floppy drive (I've never seen on without a hard disk. They may have been offered that way. Dunno.) The hard disk may be 20, 30 or 45MB in capacity.